Sarmad Nozad Mahmood, Asnor Juraiza Ishak, Alyani Ismail, Azura Che Soh, Sameer Alani. “Recent Wearable Antenna Technologies: An Overview”. International Journal of Advanced Science and Technology, Vol. 29, no. 04, June 2020, pp. 5618 -31, http://sersc.org/journals/index.php/IJAST/article/view/27050.